Carburetor



Patented Nev. 23, 1926.

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VALENTINE ycinnamon NEW YORK, iv. Y.

l cARBURnToa Application'fnea january 17,1924. 'serialv No.-'6s6,741.

eiciency, etc., and comprises a gas'feeding and mixing apparatus which is an improvement on my co-pending patent application Ser. No- 602,522.

In the accompanying drawings, I have illustrated in Fig. 1 in longitudinal section, a circular housing or tube provided with a slidable venturi, embodying` an application of my invention. Fig. 2 is a detail of the lower part of the same with the upper part broken away Fig. 3 is a plan view look"- ing down upon Fig. 2. Fig. 4 is an enlarged detail in plan view of one of the jaws illustrated in Fig. 3. Y

Referring now more particularly to Fig. 1, it will be observed that within the tube or chamber 8 is located the usual butterfly throttle valve 9, and in the lower part is secured the tube 10 by any suitable means such as the screw 11. 12 indicates another1 tube within the base of which the venturi 13 is secured such as by the threads 11i, and the tube 12 is slidable within the tube 10. The tube 12 is provided with openings or ports 15 which are adapted to register with the openings or ports 16, 17 in the tubes 10-8 respectively when the tube 12 is lifted sufficiently, and the tube 12 is also provided with an opening 18 to clear the screw 11 which retains the tube 10 within the tube 8. The fuel or vaporl enters through the nozzle 19 and the air through the inlet 2O the air and fuel mixing in the venturi 13 and passing upwardly beyond the valve 9. As the speed of the engine increases, the increased suction therefrom lifts the venturi 12, 13 causing the ports 15,16 and 17 to gradually come into alignment and allowing additional air to enter therethrough and to mix with the air and vapor mixed in the venturi, passing into the engine As the speed of the engine drops, the suction being reduced, reduces the inlet of auxiliary air through the ports 15, 16 and 17, thereby automatically supplying the predetermined and proper amount of additional air with the increase in speed of the engine. At the same time, as the venturi rises, the opening thereto from t-he air inlet 20 also increases. This is provided for by the jaws 21, 22 pivoted at 23 and having slots such as 24 which register and are penetrated by the pin y25. Fach of the jaws also have a depending lportion such as 26 with a slot such 'as'.27, and the slot of one jaw is at an angle to the other asfindicated at 28 in Fig. 2. 29-is a pin secured in the venturi as shown and provided with an offset 30, which en gages the slots 27, 2S so that as the venturi 12, 13 is sucked up within the tube 8, the offset 30 of the pin 29 moves the jaws 21, 22 apart, thereby allowing an increase of air to enter from the inlet 20 and as the venturi drops with reduced speed of the motor, the offset 30 of the pin 29 draws the jaws together again thereby reducing the air through the inlet 20, and this increase and reduction of air through the inlet 2O with the increase and reduction of speed of the motor, is simultaneous with theincrease and n reduction of auxiliary air entering through theI ports 15, 16 and 17, This provides a convenient method for increasing the air with the speed of the motor without increasing the fuel, whereas if the entire increase of air were below the nozzle 19, the additional travel thereof through the venturi would carry a needless additional quantity of fuel with it, and would not result in the efficiency sought.

Of course it will be understood that various modifications may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

I claim:

1. A device of the character described, composing a mixing chamber, a fuel feeding nozzle therein, a slidable venturi in said chamberv surrounding said` nozzle and adapted to be raised by suction, an air inlet disposed above said nozzle, a slide valve` controlled by the movement of said venturi for progressively opening said inlet, an air inlet below the venturi, oscillating jaws for controlling said last mentioned inlet, and means connected with the venturi for operating said jaws in consonance with the movement of the venturi.

2. A device of the character described, comprising a mixing chamber, a fuelfeeding nozzle therein, a slidable venturi in said chamber surrounding said nozzle and adapted to be raised by suction, anV air inlet disposed above said nozzle, a slide valve controlled by the movement of said venturi for progressively opening said inlet, an air inlet below the venturi, oscillating jaws for lli) controlling said last mentioned inlet, means connected with the venturi for operating said jaws in consonance with the movement of the venturi, said means comprising an operating pin extending downwardly from the venturi, an oiifset end carried by said pin, and depending portions `projecting from said jaws provided with increase slots receiving said ofl'set end.

3. A device of the character described, comprising a mixing chamber, a fuel feeding nozzle entering said chamber, va venturi surrounding said nozzle and slidably mounted within said chamber, said mixing chamber having an air feeding opening in incense the wall thereof vdisposed above said nozzle, means operated bythe movement of said venturi for progressively opening and closing the air feeding opening during the movement of the venturi, an air feeding opening below the discharge end of said nozzle, swinging jaws pvotally mounted in said mixing chamber for controlling said last mentioned opening, and means conneoted with the ventnri for operating said jaws.

In testimony whereof/I hereunto aiiix my signature.`

VALENTINE G. HUSH. 

